JPS6050007B2 - High dielectric constant porcelain composition - Google Patents
High dielectric constant porcelain compositionInfo
- Publication number
- JPS6050007B2 JPS6050007B2 JP57214867A JP21486782A JPS6050007B2 JP S6050007 B2 JPS6050007 B2 JP S6050007B2 JP 57214867 A JP57214867 A JP 57214867A JP 21486782 A JP21486782 A JP 21486782A JP S6050007 B2 JPS6050007 B2 JP S6050007B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric constant
- composition
- high dielectric
- porcelain composition
- sintering temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000203 mixture Substances 0.000 title claims description 17
- 229910052573 porcelain Inorganic materials 0.000 title description 6
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 239000003985 ceramic capacitor Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はセラミックコンデンサ用材料に適した焼結温
度の低い高誘電率磁器組成物に関するものてある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high dielectric constant ceramic composition having a low sintering temperature and suitable as a material for a ceramic capacitor.
従来例の構成とその問題点
誘電材料の具備すべき特性は用途により異なるが、セ
ラミックコンデンサでは誘電率が大きく、かつ焼結温度
の低いことが要求される。Structure of conventional examples and their problems The characteristics that a dielectric material should have vary depending on the application, but ceramic capacitors are required to have a high dielectric constant and a low sintering temperature.
誘電率が大きいことは素子の小形化にとつて重要な条件
である。焼結温度の低いことは、磁器材料の焼成の際に
、焼成炉の炉材に安価なものを使用できることおよび焼
成のエネルギーが少なくてすむことなど工業的価値が大
きい。また、積層型セラミックコンデンサにおいて、焼
結温度が低いと内部電極として銀を主成分とする比較的
安価な電極材料を用いることができるため、コンデンサ
の価格を著しく下げることができる。 従来、高誘電率
のセラミックコンデンサ用材料としては、チタン酸バリ
ウム系磁器が用いられてきた。A high dielectric constant is an important condition for miniaturizing devices. The low sintering temperature has great industrial value, as it allows the use of inexpensive furnace materials for the firing furnace and requires less energy for firing when firing porcelain materials. Furthermore, in a multilayer ceramic capacitor, if the sintering temperature is low, a relatively inexpensive electrode material containing silver as a main component can be used as the internal electrode, so the price of the capacitor can be significantly reduced. Conventionally, barium titanate-based porcelain has been used as a material for high dielectric constant ceramic capacitors.
しかし、この材料は焼結温度が１３００〜１４００℃と
高いため、積層セラミックコンデンサを製造する場合に
は、その焼結温度に適した高価な白金またはパラジウム
を主成分とする内部電極を使用しなければならないとい
う欠点があつた。発明の目的
本発明は上記の欠点を改善し、焼結温度が１０００℃
以下と低く、かつ誘電率の大きい磁器組成物を提供する
ものである。However, this material has a high sintering temperature of 1,300 to 1,400°C, so when manufacturing multilayer ceramic capacitors, it is necessary to use expensive internal electrodes that are suitable for the sintering temperature and whose main component is platinum or palladium. There was a drawback that it did not work. Purpose of the invention The present invention improves the above-mentioned drawbacks, and the sintering temperature is 1000℃.
The object of the present invention is to provide a ceramic composition having a low dielectric constant as below and a large dielectric constant.
発明の構成 本発明の組成物は、Ｐｂ（Ｎｉ、Ｉ。 Composition of the invention The composition of the present invention comprises Pb(Ni, I.
Ｎｂ。１３）ｘ（Ｚｎ、Ｉ。Nb. 13) x(Zn, I.
Ｎｂ。Ｉ０）、（Ｍｇ、Ｉ。Ｎｂ。Ｉ。）２Ｏ３で表わ
される組成物において組成比が０．０１≦ｘ≦０．６０
、０．１０≦ｙ≦０．６５、０．０５≦ｚ≦０．８９（
ただし、ｘ＋ｙ＋ｚ＝１）の範囲内にあることを特徴と
する高誘電率磁器組成物である。 実施例の説明 原料
として、ＰｂＯ、ＮｉＯ、ＺｎＯ、ＭｇＯ、ＮＹ）２０
、を用いて、これらを下表に示した組成比に秤量し湿式
で混合し、これを乾燥後７５０℃で２時間仮焼したのち
、ボールミルで湿式粉砕した。Nb. In the composition represented by I0), (Mg, I.Nb.I.)2O3, the composition ratio is 0.01≦x≦0.60
, 0.10≦y≦0.65, 0.05≦z≦0.89 (
However, it is a high dielectric constant ceramic composition characterized by being within the range of x+y+z=1). Description of Examples Raw materials: PbO, NiO, ZnO, MgO, NY)20
These were weighed and wet-mixed to the composition ratio shown in the table below using a .
乾燥後、ポリビニルアルコールの水溶液をバインダとし
て直径１３ＴＷＥ）長さ約８Ｔｎｍの円柱状に加圧変形
し、バインダを焼却した後、これをマグネシア磁器容器
に入れて８８０〜１０８０℃の範囲内の温度で２時間焼
、成した。焼成した磁器を厚さｌｗｒｍに切断し、この
両面にＣｒ−Ａｕを蒸着したのち誘電率Ｅｒと誘電正接
ＤをｌＫＨ２、ＩＶ／−で室温において測定した。εｒ
の温度変化率は２０℃を基準として−２５#aＣ〜８５゜
Ｃの範囲て測定した。その結果を下表に示＊８す。上表
てＮＯ．ｌ，９，ｌＯ，ｌ５，ｌ８の試料は本発明の範
囲外のものであり、ＮＯ．２〜８，１１〜１４，１６，
１７の試料は本発明の実施例である。After drying, the aqueous solution of polyvinyl alcohol was used as a binder to pressurize and deform the cylinder into a cylinder with a length of about 8Tnm (diameter: 13TWE), and after incinerating the binder, it was placed in a magnesia porcelain container and heated at a temperature within the range of 880 to 1080℃. Bake for 2 hours to complete. The fired porcelain was cut into a thickness of 1wrm, and Cr--Au was deposited on both sides, and the dielectric constant Er and dielectric loss tangent D were measured at room temperature at 1KH2, IV/-. εr
The temperature change rate was measured in the range of -25°C to 85°C with 20°C as a reference. The results are shown in the table below*8. Show above NO. Samples No. 1, 9, 1O, 15, and 18 are outside the scope of the present invention; 2-8, 11-14, 16,
Sample 17 is an example of the invention.
上表から明らかなように、本発明の範囲内の組成物より
なる磁器は大きな誘電率（６２５０〜１４１５０）を示
すとともに焼結温度が８８０〜１０００℃であり、低い
温度で焼結できるものである。As is clear from the above table, the porcelain made of the composition within the scope of the present invention exhibits a large dielectric constant (6250 to 14150) and has a sintering temperature of 880 to 1000°C, which means that it can be sintered at a low temperature. be.
また、誘電正接Ｄが小さいこと，誘電率εｒの温度変化
率が小さいことなどの特長を示している。なお、Ｘ〈０
．０１，ｘ〉０．６０，ｚ〈０．０５，ｚ〉０．８９の
範囲の組成物は焼結温度が１０００℃を超えるため、ま
た、ｙ＜０．１０，ｙ〉０．６５の範囲では誘電率の比
較的小さい組成があるため、本発明の範囲−から除き、
本発明の範囲は焼結温度が１０００℃以下で室温の誘電
率が６０００以上の組成に限定した。It also exhibits features such as a small dielectric loss tangent D and a small temperature change rate of the dielectric constant εr. In addition, X〈0
．． Since the sintering temperature of the composition in the range of 01, x>0.60, z<0.05, z>0.89 exceeds 1000°C, and the range of y<0.10, y>0.65 Since it has a composition with a relatively low dielectric constant, it is excluded from the scope of the present invention.
The scope of the present invention is limited to compositions having a sintering temperature of 1000° C. or lower and a room temperature dielectric constant of 6000 or higher.
発明の効果本発明の組成物は誘電率が大きく、誘電率の
温度変化率と誘電正接が比較的小さいため、セラミック
コンデンサ用材料に適しているとともに、１０００℃以
下の低い温度で焼成できるため、焼成炉の炉材に安価な
ものを使用できることおよび焼成のエネルギーが少なく
てすむことなど工業的価値が大きいものである。Effects of the Invention The composition of the present invention has a large dielectric constant and a relatively small temperature change rate of dielectric constant and dielectric loss tangent, so it is suitable as a material for ceramic capacitors, and can be fired at a low temperature of 1000°C or less. It has great industrial value as it allows the use of inexpensive materials for the firing furnace and requires less energy for firing.
Claims (1)
＿１／＿３Ｎｂ＿２／＿３）＿ｙ（Ｍｇ＿１／＿３Ｎｂ
＿２／＿３）＿ｚＯ＿３で表わされる組成物において組
成比が０．０１≦ｘ≦０．６０、０．１０≦ｙ≦０．６
５、０．０５≦ｚ≦０．８９（ただし、ｘ＋ｙ＋ｚ＝１
）の範囲内にあることを特徴とする高誘電率磁器組成物
。1 Pb(Ni_1/_3Nb_2/_3)_x(Zn
_1/_3Nb_2/_3)_y(Mg_1/_3Nb
_2/_3) In the composition represented by _zO_3, the composition ratio is 0.01≦x≦0.60, 0.10≦y≦0.6
5, 0.05≦z≦0.89 (however, x+y+z=1
) A high dielectric constant ceramic composition characterized by being within the range of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57214867A JPS6050007B2 (en) | 1982-12-08 | 1982-12-08 | High dielectric constant porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57214867A JPS6050007B2 (en) | 1982-12-08 | 1982-12-08 | High dielectric constant porcelain composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59105208A JPS59105208A (en) | 1984-06-18 |
| JPS6050007B2 true JPS6050007B2 (en) | 1985-11-06 |
Family
ID=16662868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57214867A Expired JPS6050007B2 (en) | 1982-12-08 | 1982-12-08 | High dielectric constant porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050007B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4637989A (en) * | 1985-03-29 | 1987-01-20 | At&T Technologies, Inc. | Method of preparing a ceramic composition |
| JPS6226705A (en) * | 1985-07-29 | 1987-02-04 | 株式会社東芝 | High permeability ceramic composition |
| JPS62290009A (en) * | 1986-06-09 | 1987-12-16 | 株式会社村田製作所 | Dielectric ceramic composition |
-
1982
- 1982-12-08 JP JP57214867A patent/JPS6050007B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59105208A (en) | 1984-06-18 |
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